I wish I had kept the receipt and box

A short while ago I was so proud of myself!  I had gone shopping and brought home an “Infinity Razor.”  The box claimed that the blade would never need to be replaced; it would stay sharp forever.  It looked like your basic manual razor, but I thought “Well, what the heck, with modern technology, who knows, I’ll buy it!”  I can’t even remember how much I paid for it.  This morning my wife saw me rummaging around the bathroom, looking for a fresh razor.  She asked me why wasn’t I using my “special, wonderful Infinity Razor.”  I was sorry to tell her that the blade was dull on the very second shave!  I’m going to try to find a customer contact number on the Internet to lodge a complaint about it.  I wish I’d kept the receipt and packaging!